How many minutes in p hours​

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

Multiplying an even number of negative numbers gives an answer that is choose from:

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais